<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头部区 -->
      <div class="avater_box">
        <img src="../assets/logo.png" alt="" />
      </div>
      <!-- 登录区 -->
      <el-form label-width="0px" class="login_form" :model='loginForm' :rules='loginFormRules' ref="loginFormRef">
        <!-- 账号 -->
        <el-form-item prop='username'>
          <el-input prefix-icon="iconfont icon-ren" v-model="loginForm.username"></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop='password'>
          <el-input type="password" prefix-icon="iconfont icon-suo" v-model="loginForm.password"></el-input>
        </el-form-item>
        <el-form-item class="btns">
          <el-button type="primary" @click='login' :plain="true">登录</el-button>
          <el-button @click='resetLoginForm'>重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      //登录表单数据绑定
      loginForm: {
        username: 'admin',
        password: '123456'
      },
      //表单验证规则对象
      loginFormRules: {
        //验证用户名是否合法
        username: [
          {required: true, message: '请输入账号', trigger: 'blur'},
          {min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur'}
          ],
        //验证密码是否合法
        password: [
          {required: true, message: '请输入密码', trigger: 'blur'},
          {min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur'}
          ]
      }
    }
  },
  methods: {
      //点击重置按钮重置表单
      resetLoginForm(){
        this.$refs.loginFormRef.resetFields();
      },
      //点击登录按钮进行预验证
      login(){
        this.$refs.loginFormRef.validate(async valid => {
          if(!valid) return;
          const {data: res} = await this.$http.post('login',this.loginForm);
          if (res.meta.status !==200) return this.$message.error('登陆失败');
          this.$message.success('登陆成功');
          window.sessionStorage.setItem('token',res.data.token);
          this.$router.push('/home')
        })
      }
    }
};
</script>

<style lang="less" scoped>
.login_container {
  background-color: #2b4b6b;
  height: 100%;
}

.login_box {
  width: 450px;
  height: 300px;
  background-color: #fff;
  border-radius: 3px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  .avater_box {
    width: 130px;
    height: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    padding: 10px;
    box-shadow: 0 0 10px #ddd;
    background-color: #fff;
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
    img {
      width: 100%;
      height: 100%;
      border-radius: 50%;
      background-color: #eee;
    }
  }
}

.btns {
  display: flex;
  justify-content: flex-end;
}

.login_form {
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0 20px;
  box-sizing: border-box;
}
</style>
